84669 person learning
152542 person learning
20005 person learning
5487 person learning
7821 person learning
359900 person learning
3350 person learning
180660 person learning
48569 person learning
18603 person learning
40936 person learning
1549 person learning
1183 person learning
32909 person learning
比如:
57.12 百分比格式化 57.12% 12.00 百分比格式化 12% 12.10 百分比格式化 12.1% 12.01 百分比格式化 12.01% 如果小数为0的部分就省略。。。
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// 感觉你的需求就是去0,使用parseFloat就行 parseFloat(num) + '%'
var num =12.10; if(num%1==0){ num =~~num; }else{ if(num%10==0){ num =~~num+'.'+num/10; } } num;
Math.round(num*100)/100 + '%'
小数点第三位开始会四舍五入
var testArr = ['11.0000', '57,12', '12.00', '12.10', '12.01']; testArr.forEach(val => console.log(val.replace(/(\.?0*$|$)/, '%')))
function changeToPercent(num){ if(!/\d+\.?\d+/.test(num)){ alert("必须为数字"); } var result = (num * 100).toString(), index = result.indexOf("."); if(index == -1 || result.substr(index+1).length <= 2){ return result + "%"; } return result.substr(0, index + 3) + "%"; }
小数点第三位开始会四舍五入